Competitors for 2021 International Swimming League (ISL)
| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Javier Acevedo |  CAN |
SWI | 28 January 1998 |
| Bailey Andison | CAN |
SWI | 13 November 1997 |
| Zach Apple |  USA |
SWI | 23 April 1997 |
| Emilie Beckmann |  DEN |
SWI | 4 February 1997 |
| Tatiana Belonogoff |  GBR RUS |
SWI | 16 July 2001 |
| Thom de Boer |  NED |
SWI | 24 December 1991 |
| Lisa Bratton | USA |
SWI | 5 May 1996 |
| Annika Bruhn |  GER |
SWI | 5 October 1992 |
| Vladyslav Bukhov |  UKR |
SWI | 5 July 2002 |
| Apostolos Christou |  GRE |
SWI | 1 November 1996 |
| Tess Cieplucha | CAN |
SWI | 24 September 1998 |
| Imogen Clark |  ENG GBR |
SWI | 1 June 1999 |
| Michelle Coleman |  SWE |
SWI | 31 October 1993 |
| Tommy Cope | USA |
SWI | 11 January 1997 |
| Breno Correia |  BRA |
SWI | 19 February 1999 |
| Ali DeLoof | USA |
SWI | 14 August 1994 |
| Valentine Dumont |  BEL |
SWI | 2 July 2000 |
| Felipe França | BRA |
SWI | 14 May 1987 |
| Béryl Gastaldello |  FRA |
SWI | 16 February 1995 |
| Robert Glință |  ROU |
SWI | 18 April 1997 |
| Anastasia Gorbenko |  ISR |
SWI | 7 August 2003 |
| Madeline Groves |  AUS |
SWI | 25 May 1995 |
| Louise Hansson | SWE |
SWI | 24 November 1996 |
| Zach Harting | USA |
SWI | 27 August 1997 |
| Julia Hassler |  LIE |
SWI | 27 February 1993 |
| Brent Hayden | CAN |
SWI | 21 October 1983 |
| Isabella Hindley | ENG GBR |
SWI | 1 October 1996 |
| Ryan Hoffer | USA |
SWI | 9 July 1998 |
| Anna Hopkin | ENG GBR |
SWI | 24 April 1996 |
| Ida Hulkko |  FIN |
SWI | 12 December 1998 |
| Tomoe Hvas |  NOR |
SWI | 1 June 2000 |
| Zsu Jakabos |  HUN |
SWI | 3 April 1989 |
| Yuri Kisil | CAN |
SWI | 18 September 1995 |
| Finlay Knox | CAN |
SWI | 8 January 2001 |
| Ranomi Kromowidjojo | NED |
SWI | 20 August 1990 |
| Luc Kroon | NED |
SWI | 30 August 2001 |
| Marius Kusch | GER |
SWI | 5 May 1993 |
| Max Litchfield | ENG GBR |
SWI | 4 March 1995 |
| Luiz Altamir | BRA |
SWI | 9 May 1996 |
| Linnea Mack | USA |
SWI | 27 November 1995 |
| Martin Malyutin | RUS |
SWI | 5 July 1999 |
| Kylie Masse | CAN |
SWI | 18 January 1996 |
| Summer McIntosh | CAN |
SWI | 18 August 2006 |
| Cody Miller | USA |
SWI | 9 January 1992 |
| Leah Neale | AUS |
SWI | 1 August 1995 |
| Anna Ntountounaki | GRE |
SWI | 9 September 1995 |
| Marco Orsi |  ITA |
FIN/SWI | 11 December 1990 |
| Jacob Pebley | USA |
SWI | 17 September 1993 |
| Erik Persson | SWE |
SWI | 12 January 1994 |
| Blake Pieroni | USA |
SWI | 15 November 1995 |
| Veronika Popova-Andrusenko | RUS |
SWI | 20 January 1991 |
| Cole Pratt | CAN |
SWI | 13 August 2002 |
| Alberto Razzetti | ITA |
SWI | 2 June 1999 |
| Maxime Rooney | USA |
SWI | 16 April 1998 |
| Christopher Rothbauer |  AUT |
SWI | 29 January 1998 |
| Shane Ryan |  IRL |
SWI | 27 January 1994 |
| Emre Sakçı |  TUR |
SWI | 15 November 1997 |
| Kayla Sanchez | CAN PHI |
SWI | 7 April 2001 |
| Nicholas Santos | BRA |
SWI | 14 February 1980 |
| Fernando Scheffer | BRA |
SWI | 6 April 1998 |
| Fabian Schwingenschlögl | GER |
SWI | 15 August 1991 |
| Barbora Seemanová |  CZE |
SWI | 1 April 2000 |
| Aleksandr Shchogolev |  NEU RUS |
SWI | 6 April 2002 |
| Tom Shields | USA |
SWI | 11 July 1991 |
| Laura Stephens | ENG GBR |
SWI | 2 June 1999 |
| Jenna Strauch | AUS |
SWI | 24 March 1997 |
| Dominika Sztandera |  POL |
SWI | 19 January 1997 |
| Mariya Temnikova | NEU RUS |
SWI | 17 November 1995 |
| Alys Thomas | GBR WAL |
SWI | 10 October 1990 |
| Andreas Vazaios | GRE SWE |
SWI | 9 May 1994 |
| Abbey Weitzeil | USA |
SWI | 3 December 1996 |
| Katarzyna Wilk-Wasick | POL |
SWI | 22 March 1992 |
| Ingrid Wilm | CAN |
SWI | 8 June 1998 |
| Madi Wilson | AUS |
SWI | 31 May 1994 |